After first bloom in June.

Apr 02, The best time for pruning lilac bushes is right after their flowering has ceased. This allows new shoots plenty of time to develop the next season of blooms. Pruning lilacs too late can kill young developing buds. If you are pruning lilac trees or shrubs entirely to within inches of the ground, it is best to do so in early spring.

Lilac bushes bloom only once each year, in spring, but they make new buds after they bloom. The buds become the next year’s flowers. If you trim a lilac bush too late in the year, then you’ll cut. Jul 08, The time to prune mature lilac plants is just after the flowers have faded in the spring. Lilacs set next season's flower buds almost immediately, so late pruning will mean sacrificing the next year's flowers.   Pruning early also gives new shoots more time and energy to develop, ensuring plenty of blooms for the following spring.

Lilac trees that are over three years old can safely have these removed as close to the ground as possible. Do this from mid-June onwards. For new lilac trees in their first year, remove all the forming flower buds before they start to bloom. This is usually around the first week of shrubremover.barted Reading Time: 6 mins. May 26, The best time to do this is in its earliest years. Your lilac tree will be blooming in the first 2 to 3 years and you should dead head it as soon as the flowers fade and die.

When you dead head your lilac tree, you remove older flowers and help your tree focus it’s 5/5(1). Jun 26, Timing is the Decisive Factor in Pruning Lilacs If you want to have your blooms next year, it is crucial to prune in those first few weeks after blooming ends.

Ideally, this is when you would do maintenance pruning each year. But I get so lazy busy, I end Estimated Reading Time: 4 mins. Prune lilac tree. This tree is looking rather scraggly and sparse. It hasn’t been pruned stump tree grinder blooming for 10+ years by the old owners. There are also lots of dead small branches interspersed with active ones. Can it be pruned aggressively for a fresh start?

Sep 27, The best time to prune a lilac tree is immediately after flowering. Perform a rejuvenation pruning on mature Japanese lilac trees every few years by cutting one-third of the large, old stems all the way back to the ground in late winter. The proper time to prune deciduous shrubs is determined by the plant's growth habit, bloom time, and health or condition. Spring-flowering shrubs, such as lilac and forsythia, bloom in spring on the growth of the previous season.

The plant's health or condition determines the best time to prune.